Problem
Suppose the read/write head is at track 97, moving toward track 199 (the highest-numbered track on the disk) and the disk request queue contains read/write requests for sectors on tracks 84, 155, 103, 96, and 197,respectively.
A. What is the total number of head movements needed to satisfy the requests in the queue using the FCFS optimization strategy?
B. What is the total number of head movements needed to satisfy the requests in the queue using the Scan optimization strategy?
C. What is the total number of head movements needed to satisfy the requests in the queue using the Look optimization strategy?